The international who's who 1997-98
Europa Publication Limited, 1998
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The international who's who 1994-95
Europa Publication Limited, 1994
Buku Referensi
The international who's who 1992-93
Europa Publication Limited, 1994
Buku Referensi
Who's who in international affairs
Europa Publication Limited, 1990
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The international who's who 2008
Routledge, Taylor & Francis Group, 2007
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